Power Down - Texas Instruments TMS320C6201 Reference Manual

Clock Output Enabling Clock Output Enabling / Emulation Halt Operation / Power Down
9.10 Clock Output Enabling
9.11 Emulation Halt Operation

9.12 Power Down

9-64
To reduce electromagnetic interference (EMI) radiation, the EMIF allows the
disabling (holding high) of CLKOUT2, CLKOUT1, SSCLK, and SDCLK. This
disabling is performed by setting the CLK2EN, CLK1EN, SSCEN, and SDCEN
bits to 0 in the EMIF global control register, which is shown in Figure 9–6 on
page 9-9 and summarized in Table 9–3 on page 9-10.ECLKOUT cannot be
disabled using software.
The EMIF continues operating during emulation halts. Emulator accesses
through the EMIF can work differently than the way the actual device works dur-
ing EMIF accesses. This discrepancy can cause start-up penalties after a halt
operation.
In power-down 2 mode, refresh is enabled. SSCLK, CLKOUT1, and CLKOUT2
are held low during power-down 2 and power-down 3 modes. In power-down
3 mode, the EMIF acts as if it were in reset. See Chapter 14, Power-Down
Logic, for further details on power-down modes.
For the 'C6211/C6711, refreshes are issued to SDRAM if ECLKIN is provided.